SEABROOK, N.H. — The 19-year-old driver who police say ran down and killed two cyclists over the weekend has faces negligent homicide charges, and a woman police say sold the teen drugs has been arrested as well.

Darriean Hess of Seabrook, N.H. faces two Class B felony counts of negligent homicide and two Class B felony counts of second-degree assault. Each of the Class B felonies is punishable by a maximum sentence of 3½ to 7 years in prison and fines up to $4,000 for each offense if she is found guilty.

Just hours after the motorist accused of killing two bicyclists during the annual Granite State Wheelman Tri-State Seacoast Century ride was arraigned at Hampton Circuit Court, police announced the arrest of a woman they say sold Hess drugs and knowingly allowed her to operate a motor vehicle without a license.

Hampton police say Cindy Sheppard, 48, of 51 Ocean Blvd., Hampton, sold a controlled drug to Hess, 19, of Seabrook, some time after 1:30 a.m. on Saturday.

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Less than an hour earlier, at 12:46 a.m., Hess had been pulled over by police and ticketed for driving without a motor vehicle license and speeding as she crossed the Neil R. Underwood Memorial Bridge. That is the same bridge where police say Hess mowed down Pamela Wells, 60, of South Hamilton, Mass., Elise Bouchard, 52, of Danvers, Mass., Uwe Uhmeyer, 60, of Essex, Mass., and Margo Heigh, 54, of Danvers, Mass., at approximately 8:30 a.m. Saturday morning.